Gummed tape



Jan. l0, 1939. F. HuMPHNl-:R

GUMMED TAPE Filed July 29, 1955 1,. r, www, y ww M JW!! 7% Patented Jan.10, 1.939l

GUMIIED TAIE Ferdinand W. Humphner, Oak Park, Ill., assignor, by mesneassignments, to Mid-State Gummed Paper Co., a corporation of DelawareApplication July 29,

. 3 Claims.

This invention relates to gummed tape and more particularly to gummedpaper tape provided with a reinforcing of latex-treated paper.k

An object of the invention is to provide a rein- 5 forced orlatex-treated paper provided with adhesive or gum, and more particularlya latextreated paper provided with a water-soluble gum or adhesive.

The invention is illustrated, in a preferred em- 10 bodiment, by theaccompanying drawing, in which is shown a perspective view of agummedpaper strip or tape embodying my invention, the strip of' gummed paperbeing shown separated from the rubber cement and latex-treated papernear one end of the strip.

Latex-treated paper is 1a well known product. It is made ordinarily bypassing an unsizedor absorbent paper into a bath containing a latexpreparation. The paper is then passed, usually on a Wire net or screen,into suitable drying apparatus and then through several subsequentoperations in which the external surfaces of the product are cured.

The use of such a latex-treated strip as a 25 gummed tape is muchdesired because of the strength and flexibility of the product. However,such use has heretofore been found impracticable because of the tendencyof the latex, which contains moisture, to soften the gum layer. Many 30expedients have been employed in treating the external surfaces of thelatex-treated strip in an effort to render it satisfactory for theplacing of gum thereon, but all of such expedients, as far as myknowledge goes, have failed.

In my co-pending application Serial No. 1,785, for Multi-plylatex-treated paper, I have set out one method for adaptinglatex-treated paper for use as a gummed tape. In this method, thelatextreated strip is pressed between twostrips of sized 4 paper, thesizing being such as to prevent the peni etrationof the latex throughthe outer strips.

My present invention consists of a simpler method, producing a producthaving advantages over the one described above.

In my present method, I provide one strip of paper with a layer of gum.Another strip of paper, which is preferably unsized, is treated in a.latex bath in the usual manner. The latex-treated paper is then coveredon one side with a quickdrying rubber cement, which preferably containsmethyl alcohol or benzol, or some similar fastdrying solvent. The twostrips of paper are then combined by the rubber cement. leaving thei935, serial No. 33,779

gumrned surface on the top of the strip and the latex-treated paper onthe bottom thereof, as illustrated in the drawing'. The rubber cementnot only serves as a bond between the latex-treated paper and the gummedpaper, but also pro- 5 Vides awater-proof sheet between the latex andthe gummed paper, thus preventing the passing of any moisture from thelatex into the gummed layer. The new product, it will be seen, thuscomprisesV but two strips of paper, one containing the gummed layer andthe other containing the latex reinforcement, the latex being renderedinnocuous, as far as affecting the gum is concerned, by the cementingmaterial between the two strips.

After the two sheets are combined, `the latextreate'd sheet is embossedwith a cloth pattern to give it a textile appearance as well as toincrease its flexibility.

The tape product resembles very closely in appearance a cloth-reinforcedtape, and while affording an extremely tough and resistant body, issubstantially as flexible and as pliableas a cloth-reinforced tape.

The foregoing detailed description has been given for clearness ofunderstanding only, and no unnecessary limitations should be understoodtherefrom, but the appended claims should be construed as broadly aspermissible, in view of the prior art.

I claim: y

l. A gummed tape comprising a strip of paper,

a layer of water-soluble gum' on one side of said paper, a cellulosesheet impregnated with rubber deposited from latex, and rubber depositedfrom 35 an organic solvent uniting the other side of ,said paper stripand cellulose sheet.

2.' A gummed product comprising a paper strip coated on one side with alayer of Water-soluble gum, a paper strip impregnated with rubber de- 40posited from latex, and rubber deposited from an organic solvent unitingsaid impregnated strip with the uncoated side of said gummed coatedpaper strip.

3. A gummed product comprising two strips of paper, one of said stripsbeing impregnated with rubber deposited from latex, rubber depositedfrom an organic solvent uniting saidstrips of pa.- per', saidimpregnated strip being embossed on its outer side, and a layer ofwater-soluble gum on ti outer face of said'non-impregnated paper s p.

